Talk:UDF 423

Red shift and distance seem grossly overstated
https://www.researchgate.net/figure/UDF-5417-is-a-woolly-galaxy-the-other-two-are-multiple-arm-and-have-been_fig3_259212229 states Z=0.29 not 1, and https://www.answers.com/Q/What_is_the_UDF_423_galaxy states distance 4.7 billion l.y., which roughly corresponds to Z-conversion chart at https://www.technologyreview.com/s/513026/the-paper-and-pencil-cosmological-calculator/ as around/above 4 (the "time" scale) which matches quoted 7.7 for z=1. Hey, 4.7 is when Earth has just got formed!